barkley



March 29s, -1927, 1,622,564 v L F. W'. BARKLEY OVER RQ'LjATING CHECK .FOR CALAGULATING'MACMNES original Filed Maroh'lsf 19,2'1 2 Sheetsheet'l f A1622,564 Mrch 29'1927' F. wBARKLEY ovm aoTAfr1Ncf,.cHcx FOR CALCULATING MACHINES orikinal Filed March la, 1921 z sheets-sheet 2 Patented Mar.29,1927. y i I i 1,622,564- `UNITED STATES PATENT OFFICE.

FRED W. IBARKLEYpOF WINTHROP, MASSACHUSETTS, ASSIGNOR TO ALBERTO BARK- LEY,v F PAINTED POST, NEW YORK.

'OVEREOTATING CHECK FOR CALCULATING MACHINES.

Original application led March 18, 1921, Serial No. 453,356. Divided and this application led March 18,

v v 1921. Serial No. 453,357.

The invention relates to'calculating maing operations required. Also formed on 55 chines of the. type having a suitable selectthe carriage 12, is a catch 14 Awhich c0- ing mechanism, and operating` mechanism, operates with the holes 15 formed in the a novel -ovcil rotating device for obt-ainlng.,r vcover 11, which registers with the set of a certain calculation -which can be indicated dials and mechanism required to perform a on one or more rotary registering dials to certain calculation. Mounted in the cas- 60 obtain a definite or predetermined result. ing 11 are several sets of operating keys. The invention consists vof a mechanism for Six sets are commonly used but as many preventing the rotary dials and operating sets can be used as is necessary in accord- Hl mechanism from over rotating to ensure acance with the size of the machine.l Each curacy in manipuation of rapid operations set of keysv indicates the numerals from 65 and makes a positive stop or check of the zero to nine inclusive, and each succeeding rotating members at high speed. It also set will be indicated by numerals and small consists of a double acting over rotating letters, a, b, c, etc. As each set of keys and 15 check which is extremely effective in either* operating parts are identical in construction,

' Vdirection of rotation of the operative mema .descriptionof one will be suihcient. The 70 bers, l six sets of keys will have a range of calcula- The object of the invention is to provide tion from one to 999,999 and further calculaa calculation machine having an effective tions may be obtained by manipulating the rotating mechanism for allowing' certain carriage l2.

numerals to be se`ected to obtain a definite When the numerals are -selected to be cal 75 calculation adapted tobe used with a novel culated the results are'obtained by rotating double acting over rotating check which can the crank 16. To obtain a result inaddition. be operated in either direction of rotation and multiplication the crank 16 is turned which is durable, practical, noiseless, and in one direction, and for subtraction and inexpensive to manufacture. A complete division the crank 16 is turned in the 0p- `8l description of the calculating machine and posite direction. The result of the calculavmy improvements are as follows, reference tion is shownthrough the AWindow` 17,

.l being made to the accompanyingl drawings formed in the carriage 12. To clear out the 3o of which` figure-d calcuation, the dials are returned Figure 1 is a side elevation of a calculatto the zero position by the handle 18, Which 85 ing machine with the casing in section with controls the clear out mechanism. The

parts broken away to show the operating numerals showing through the Windows 17 mechanism. indicate the numerical result determined by Figure 2 is a corner plan view of thev the keys from 1 to 9 inclusive and the operamachine showing ,the operating mechanism. tion of the crank 16 in reation to a given or- 9o Figures 3, 4, 5, and 6 show the over romula calculated.- Each of the six sets of tating mechanism in dierent operating se`ecting keys are marked with ten numerpositions. als ranging from zero to nine, which con- 40 Fig. 7 is a plan view of the over rotating trols the rotating registering dials and each mechanism. succeeding dial marking in the next order 95 Figure 8 is a sidel elevation of the carryof ten' in either direction. The keys, zero ing over mechanism. to nine, a, b, c, etc. are mounted in a hous- Thel calculating machine is provided with ing secured to the cover l1 which allows .45 operating keys ranging from 0 to 9, inthe keys to'be readily placed in position or elusive. which are connected to, and set up taken-out as the condition requires. The 100 the calculating mechanism. The calculating keys are guided in their vertical movement mechanism is located in a suitable casing "by the cover 11 and p`ate 19, and are c0n- 10, having a cover 11, and a transverse slidstantly pressed upwardly bythe spring 20,

ing carriage 12. Formed on the sliding carthat `is if the keys are pressed downwardly riage, 12, is an operating iingerl, for liftby.' the operator, it operates the setting-up 105 ing the carriage and moving it back and mechanism and also locks it' temporarily forth across the machinel and calculating in'position' and when released the keys and mechanism accordancewith the calculatsetting-up mechanism will be returned to the inoperated position by the spring 20. When a .key Ais pressed downwardly by the-operator ma .calculating operation it 1s automatically locked in position until the next key in the bank is operated. When the next succeeding key `is operated it-not only automatically. is locked in position, but it automaticallyunlocks the previously o erated key which 'returns to its inoperative position. The zero key in each ban of keys does not function only to unlock the downward pressed keys in its respective bank, but unlocks the keys which are set which allows them to return to the nonoperative position; Forming a part of the key housing isa stationary plate 21 on which part of the setting-up mechanism is secured.

buperimposed on the stationary platel21'is a sliding plate 22 having ten slots 23 machined therein through which the ten keys extend for operating the setting mechanism. Formed on the keysl from one to nine inclusive are cam surfaces 24, of different length which are designed to give variation the numeral 9 to view on the registering dial. All intervening numerals, when used,

' would cause the setting-up mechanism to be moved correspondingly to bring the numeral to view in the registering dial.

,Mounted on the stationary plate21 are the bell cranks 25, a, b, c, etc., corresponding to the number of banks of keys used which are operated by the sliding plates 22, a, b, c, etc. The bell crank 25 is fulrumed at 26 on the stationary plate 21. v

Integral with the bell crank 25 is a projection 27, which cooperates with 'the sliding plate 22 for swinging the bellcrank 25 into the -designated position determined by the operation of 9 inclusive.

any one of-the keys from 1 to The swinging movement bell crank 25 .imparts an axial movement to the gear 28, mounted on the shaft 29. The gear 28 rotates on the shaft 29 and also is free to move axially thereon within the range of the cage gear 30. This range of movement allows the selecting mechanism to operate within the range of numerals 1 to 9 inclusive. controlled by the operating handle 16, shaft v 3 1, which is a part of the handle 16, bevelv k indicated by 1, 2, 3, 4, 5, 6,

sponding tooth on keys has a cam surfa ce of.l

to the numeral 1 would move the shortest the sliding plate sufli-l 'this operation the strips 39 to'the key depressed cause the gear 28'to,

lever 49 having a wiping of the'v The selecting mechanism. 1s

across the mai-lime and is adapted to receive 4a plurality of disks 38, on which a part of the selecting vmechanism is mounted. The part of the selecting mechanism mounted on the disks 38, consists of nine strips 39, made preferably of metal and each strip 7, 8 and 9 corresponding to the keys-operated to obtain a certain operation. The nine strips 39'are each provided with a tooth and a clearance depression 40, each strip having a tooth and depression of different length. The strips will mesh with on the gear 28 indicated by thesetting-up mechanism, and clear the remaining teeth by passing through the depression. Each will mesh with a corre- -the gear 28, and if the said gear 28 is moved axially along the shaft by the key 5, strips 1 to 5 inclusive of strips 39 will mesh with a corresponding number of teeth on the gear 28, thereby moving the distance of five teeth. keys .from 1 to 9 inclusive is operated it will move the gear 28 axially on the shaft 29 into a position corresponding to the number of strips 39 indicated. When a numeral is selected the key-bearing that numeral will be pressed downwardly, the gear 28 axially position corresponding to the key selected. The operating handle is then rotated in the direction desired which causesthe disks 38 and strips 39 to rotate one revolution. By

one of4 these strips rotate the distance or numeral designated. The rotating movement of the gear 28 is communicated'to the registering dial 41, a, b, c, etc. through the cage gear 30, intermediate gear 42 and dial gear 43 thereby showing the result of the calculation on that particular dial 41.

.' Theover-rotating check which is themain embodiment of my'invention consists of a foot which follows the cam contour of the dise 38 and raises and lowers the lever as the' conditionv requires.

thereby, -moving 'on the shaft 29 to a ,corresponding o? coriesponding teeth I If any one of the llO '- The lever 44 is loosely `mounted on lthe f rocker shaft 45. Pivotally secured to the oppositev endvofl lever 44 is a pawl 47, which engagesthe teeth of the gear 42 and prevents it from overrotating beyond a predetermined position.-

The lever and the cam surface on t-he disk 38 and by the rockershaft 45 at a predetermined time, either on a forward or reverse movement. The lever 44 is broken away at one end to show-the position of the `pawl 47, as indi-- cated by the broken portion 48, Fig. 3. The

pawl are controlled by both A hook portion of the pawl 47 rests against the rocker shaft which limits its movement in thatdirection. When the opposite end ofthe pawl engages the teeth of the gear vent over-rotation.

In Fig. 3 the lever 44 is on an upper cam surface with the pawl-47 in a checking position between the teeth of gear 42. In this relation the lever 44 and pawl 47 can be considered as integral with each other because the pawl 47 which is pivotally sccured to the lever 44V is prevented from turning by the shaft l45 in one or the forward direction, as the gear 42 rotates in a counter-clockwise direction, and as the pawl 47 is prevented from turning by the shaft 45,

it is obvious that a positive stop can be obtained. Fig. 4 shows lever 44 in the forward operating position having dropped down to the lower cam surface throwing the pawl out of engagement with the gear 42- which is now free to rotate.

In Fig. 5, the gear 42 has rotated to av predetermined position and has just been locked by the lever 44 riding upon theupper cam surface and the pawl 47 which has engaged the gear 42, preventing further rotation. This forward checking mechanism in addition to other mechanism, prevent over-rotation when the machine is operated in the reverse direction, when the calculations are in subtraction and division.. It is obvious as shown at Fig. .6, that lever 44 is raised away from the cam surface by the lever 50 wiping against the outer cam surface of the cam 51 causing the opposite end of the lever 52 to engage the pin 53 and turn it with the shaft 45 until the said pin 53` comes in contact'with the pin 54, causing it to lift the lever 44 away from the cam surface of the disk 38 and is held in this position during the entire operation. The over-rotating operation depends entirely on the pawl 47 and spring 49. lVhen the disk 38 moves in a counter-clockwise direction and the gear 42 l'rotates in a clockwise direction by the operating mechanism, the pawl wipes over each tooth against the tension of the spring 49 until a predetermined tooth in the gear 42 is reached. The position desired is determined by the selecting mechanism or after the selecting or transfer operation is complete, after which.

the power is removed from the gear 42 and is immediately prevented from further rotation by the pawl 47 and spring 49. I Vhen' the predetermined time is reached for the the momentum of the gear 47, thereby causing it to stop. I`he cam 51 holds the lever 44 in an upward position during one revolution until the lever 50 again enters the space cut in the cam and the lever 50 then drops back into the position shown in Figure 3 the opposite position being shown in Figure 6.

When the calculation requires a greater numeral than nine on any one dial a carrying-over mechanism is provided to automatically carry over the result to the next dial in the lorder of 1,0. For example, in a calculation in addition, five and five is added together which necessitates the use of the key 5 and the turning of the operating crank 16 twice, thereby turning the dial 4l one revolution and registering zero, aiidalso turning the next dial which will register one, thereby making a total reading of ten.

The carrying over mechanism consists of dial 4l and dial gear 43 the latter being provided with a pin 43 Figure '8, which is brought into action in addition and multiplication when the gear 43 is rotated to the last tooth, or nine-tenths of its revolution. In this position further movement of the gear 43, on which the pin 43 is located, engages the bevel end 55 of the arm 56 thereby forcing it downwardly and carrying with it the lever 57 having the projection 58 integral therewith, into the path of the cam 59 of the carrying over finger 60, which causes it to engage the intermediate gear 42 which in turn operates the dial gear 43 and dial 41 of the next higher order registering the result.

In subtraction and division the dial gear 43 travels in the opposite direction, and the pin 43 instantly engages the opposite side of the bevel surface 55 on the arm 56, forcing it downwardly for the carrying-over operation. The lever 56 is integral with the lever 57 and thetwo levers being connected by the cross piece 6l. The downward movement of the lever 56 is communicated to the lever 57 and causes it to be released from the spring catch 62, at the same time allowing the projection 58, formed on the lever 57, to drop into the path of the carry-over finger 60. The spring catch 62. is secured to the stationary collar 63 by a screw. The carrying-over finger is pivotally secured to the discs 38 as shown in Figures 4, 5 and .6. The portion of the carryingover mechanism extendstlirough the disc 38 and is pivoted through the lug not'shown,

ing across to the next disc is an arm, forining a part of the carrying-over finger 60 which is held from sidewise movements by a slot.

mentioned hereinbefore, in the form of a letter A. Integral with this is the tooth The upper part of the device isformed into two bevel cam surfaces 59, as

I ci

portion which engages the gear 43 ofthe next set, that is, when the lever 60 moves vinto position the bevel cam surface 59 wipes against it and causes the tooth portion to move in the path of rotation to engage the tooth of the gear 43 of the next dial gear 43. Formed Iin the disc 38 is an offset projection 64 which, invits path of rotation, comes into contact with the projection 58, formed on the lever 57, which forces it back into the spring catch 62 as shown in Figure 8. v

ll operating parts of the machine, work 'A the same in both directions, with the exception of the over-rotating check and carrying-over mechanism, the former being the embodiment of my invention. Inpthe reverse position a duplicate .carrying-over mechanism 65 is employed. The construction and operation of the carrying-over v mechanism is identical in each set and is set in a position in the disc to allow the Ycarrying-over operation to take place at the vprop- In the reverse operation, which is used in subtraction and division calculations, the carrying-over mechanism is located in live of the discs. In order to prevent all five of them from operatingV together they are set in a spiral relation on the disc and in relation to themselves, so that if one carryingover mechanism operates at a certain time,

vthe next one will be several degrees before tinct and complete operation of the mecha-l nism for determining the result of the calculation. A standard adding machine keyboard is used for the setting up Vnumbers to be added, subtracted and divided and forms part of the selecting mechanism. In proper'relation to the keyboard is a suitable crank 116 for performing the operation of calculation. On the back of the machine y is a carriage holding the dials 41whch shows the results and proofs of the operations as they are performed.v The crank 16 can op- -erate clockwise and counterclockwise; In

.examples of multiplication andvaddition the crank is turned in one direction, and for yeo subtraction and division the crank is turned in the opposite direction. YVhen the zero keys are pressed downwardly, it is only for releasing the other key in the same bank which has been used. The carriage 12, having the result dials mounted therein, may be shifted to the right or to the left with ease and accuracy to obtain the results in con-l junction with the selecting and operating mechanism. Io` obtain a result in addition or multiplication any of the keysl from 1 to 9 inclusive, in` as many sets of banks of keys as desired may be pressed downwardly and held by a suitable lock until the other key is operated in the same bank of keys when it is unlocked or when it is cleared out after the calculating operation has taken place. I keys in their respective bank causes the sliding plate 22 to move to the right, thereby imparting a swinging movement to the bell crank lever 25. As the bell crank lever 25 swings on its pivotv it causes the selecting gear 28 to move axially within the range limited by the cage gear 30. The operating This downward movement of they crank 176 isthen turned one revolutionl which causes the disc 38 to turnin the direction of the arrow A, Figure 1, thereby bringing one of the respective gear bars from 1 to 9 inclusive, into mesh with the selecting gear 28, and causes it to turn, recording 4the numeral or key previously set up. This movement of rotation of the gear 28 imparts a proportional movement of rotation to the cage gear 30, intermediate gear 42, dial gear 43 and dial 4l, thereby showing theresult or numeral through the window 17. When any of the strip barsfrom 1 to 9 inclusive are in line to engage the gear 28,

the Vover-rotating lever 44 drops down into one of the lower cam surfacesformed on the n disc 38, to cause the pawl 47 to moveout of the path of rotation of the gear 42, thereby allowing the whole train of gears and dial 41 to rotate as designated. Further rotation of the. disc 38 will cause the over-rotating check lever to be raised to the upper cam surface, and the gearsare again locked 1n position until the next operation.

In 'subtraction and division the operating crank 16 is turned in the opposite direction. One revolution causes the discs 38 and select- -ing bars from l to 9 inclusive to rotate in the opposite direction as well as all the other rotating'members thereby showing the predetermined results through tlie window 17 of the carriage 12. During the reverse operation, the over` rotation check isagain brought intoaction by a device embodying my invention, which causes the shaft 45 toy be rotated suliiciently to cause the arms 53' to turn and engage the pinl 54 .on the pawl lever 44 and lift it out of the path of the cam surfaces formed on the-disc 38., thereby .holding it rigidly in position and transferring thc over-rotation friction of the pawl 47 to the spring 48 the tension of which is suiicient to prevent it from over-rotating but allows it to rotate when power is used.

lVlien the calculating operation is carried over from one registering dial to the next in the order of ten a device is provided known as a carrying-over mechanism. When the carrying-over inechanismreaches a certain position, the tooth 9 of dial gear 43 has l reached a point where the result is to be carvried over tothe next dial by my special carrying-over device. T he carrying-oven operation depends first on the pin 54 locatedon tooth 9 of the gear-43. The rotating movement of the pin 54 .causes it to wipe against the bevel surface of the yoke lever 56 causing the latch on the said leverl 57 to be released from the catch (i2. permitting it to drop into a downward position to allow the gear to move a predetermined distance to show the designated calculation. In the reverse movement the pin 54 engages the opposite sidev of the bevel surface formed in the arm 56 forcing it down in the same manner as bctime to perform the reverse operation.'

In accordance with the provisions of the patent statutes I have described the principles of operation of my invention together with the apparatus I now consider to` represent the best embodiment thereof, but I desire to have it undersood that the apparatus shown is only an illustration and that the invention may be carried out by other" means.

The subject matter disclosed, but not claimed in the present application forms the subject matter of a eo-pending application, filed March 18, 1921, Serial Number 453,356.

What I claim as new and desire to receive by Letters Patent of the United States, is.

1. In a calculatingmachine, dial actuating mechanism therefor, a lever controlled by the actuating mechanlsm to prevent overrotation in one direction, a spring controlled pawl onv the lever and means for throwing the pawl in checking relation to the dial elements, andat the same time throwing the lever out of engagement with the actuating mechanism to prevent over-rotation in the opposite direction.

2. In a calculating mechanism, dial actuating mechanism an over-rotating preventer .locked in position to prevent overthrow in one direction under a predetermined operation of the calculating mechanism,v and resiliently held in overthrow preventing position under reverse movement of the calculating mechanism.

3. In a calculating machine, an overthrow preventer including a movable element to cooperate with the dials of the machine to prevent overthrow thereof, means'fr locking said element against movement in one overthrow position, and means for resiliently holding the element against movement in another overthrow position. i

4. In a calculating machine, an overthrow preventer including a movable element to cooperate with the dials of the machine to prevent overthrow thereof, means for positively locking said element in one position to provide a xed overthrow preventer for the dials in movement thereof in one direction, and resilient means for such elementv to resiliently holdsaid element as an overthrow preventer for the dials in movement thereof in the opposite direction.

5. An overthrow preventer for calculatin machines including a lever movable to varlous positions during the calculating operation, and an overthrowl check carried by said lever, said check being fixed against movement in one position of the lever to.

provide a positive overthrow lock and being resiliently-held against movement in another position of the'lever to provide a resilientlyresisted overthrow lock.

6. An overthrow preventer for calculating machines includingr a lever movable to various positions during the calculating operation, a check pivotally mounted on the lever to cooperate with elements of the calculating machine to prevent overthrow thereof, means operated during movement of the calculating mechanismin one direction to lock the check with relation to the lever, and a spring between said lever and check to hold the latter independent of the lever as an overthrow preventer during movement of the calculating mechanism in the reverse direction.

7. An overthrow preventer for calculating machines including registering dials, a check to cooperate with said dials to prevent overthrow thereof, a lever pivotallv supporting said cheek, a spring interposed between said lever and check. and means included in the calculating mechanism for fixing the check rigidly with the lever in movement of the dials in one direction, and means included in the calculating` mechanism for freeing .the check to the holding influence of the spring alone as an overthrow preventer in FRED W. BARKLEY. 

